Just to add to all this folks. Common rail diesels do not mind bio even at B100 levels. Assuming they pass the quality standards. The problem is with DPF regeneration. Bio fuels are not good at regenerating DPF, as the burn temperatures are not high enough in the exhaust (as the cetane number of bio is higher than that of dino diesel, hence quieter combustion).

So if you have a CR car, should be OK to run on BIO. All the seals, gaskets, hoses of modern cars are made of bio-compatible materials.

But if you have a DPF I would stay away from B100. Up to a certain percentage, maybe 50-60 bio content it should be OK. Try it and see.

Up to a certain percentage, maybe 50-60 bio content it should be OK. Try it and see.

Have been running B20-B100 Soy Diesel from NatBioGroup retail outlets for 60,000km for ten months in Superb II. Before that in PD1.9 Octavia.

The good news - Soy Diesel has much less particulate (68%) than mineral diesel so isn't expected to clog the DPF as quickly. The bypass of diesel into the sump when burnoff of the DPF occurs is the concern. SoyDiesel has double the evaporation temp of mineral diesel and so doesn't evaporate from the sump under normal running conditions as does mineral diesel. BUT less particulate of SoyDiesel means less DPF burnoff means the oil change intervals are sufficient (with my running pattern) to remove any sump buildup of biodiesel.

If you're worried (rising dip stick level or have your sump oil chemically analysed), change your oil more frequently.

Edited 26 January, 201214 yr by michaelp

Have been running B20-B100 Soy Diesel from NatBioGroup retail outlets for 60,000km for ten months in Superb II. Before that in PD1.9 Octavia.

The good news - Soy Diesel has much less particulate (75%) than mineral diesel so isn't expected to clog the DPF as quickly. The bypass of diesel into the sump when burnoff of the DPF occurs is the concern. SoyDiesel has double the evaporation temp of mineral diesel and so doesn't evaporate from the sump under normal running conditions as does mineral diesel. BUT less particulate of SoyDiesel means less DPF burnoff means the oil change intervals are sufficient (with my running pattern) to remove any sump buildup of biodiesel.

If you're worried (rising dip stick level or have your sump oil chemically analysed), change your oil more frequently.

Why are you so rabid about biodoesel? Do you actually average over 350km a day? That's half way to Melbourne from Sydney. I call BS.

duplicate post

Edited 26 January, 201214 yr by michaelp

191.69km/day actually, and no BS. My work takes me from Albury to Tweed Heads and west to Dubbo based in Sydney. Glad I don't drive a petrol powered something.

Why am I passionate about SoyDiesel? Click on this link for australian fuel industry standards and fuel comparisons

Why are you so rabid about biodoesel? Do you actually average over 350km a day? That's half way to Melbourne from Sydney. I call BS.

#............Date.............Miles.............Litres...........UK MPG........Price..........City %..........Notes

6..........26/01/12.........531.3.............49.00..............49.3............1.450..........90%

5..........14/01/12.........630.7.............51.00..............56.2............1.540..........10%

4..........12/01/12.........284.0.............28.00..............46.1............1.490............0%........avg speed 106km/h

3..........11/01/12.........539.4.............40.00..............61.3.............1.450..........20%

2..........07/01/12.........683.5.............50.00..............62.1.............1.50............05%.......avg speed 92km/h

1..........02/01/12..............................40.00.................................1.45............05%

Figures from michaelp's fuelley